Android：更改对话框片段的主题

我有一个datepicker对话框片段的代码

public class DatePickerFragment extends DialogFragment
implements DatePickerDialog.OnDateSetListener {

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
final Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);

// Create a new instance of DatePickerDialog and return it
return new DatePickerDialog(getActivity(), this, year, month, day);
}

public void onDateSet(DatePicker view, int year, int month, int day) {
// Do something with the date chosen by the user
}
}

我是这样运行的：

DialogFragment newFragment = new DatePickerFragment();
                newFragment.show(getFragmentManager(), "datePicker");

这给了我这个对话框：

当我想要它给我这样的东西时：

DialogFragment newFragment = new DatePickerFragment();
                newFragment.show(getFragmentManager(), "datePicker");

如何以编程方式或通过xml更改主题？我更喜欢xml，所以代码更少，但我不介意

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谢谢

日期选择器构造函数接受主题作为参数：

DatePickerDialog(Context context, int theme, this, int year, int monthOfYear, int dayOfMonth);

所以主题参数是：

android.R.style.Theme_Holo_Light_Dialog_NoActionBar

编辑：我想你要找的是：

 public static final int Theme_Holo_Dialog_NoActionBar = 16973937;